Improvement in machines for boring blind-stiles



3Sheets- -Sheetl. A. B. CABLIN.

. Machines for Boring Blind-Stiles. No. 141,545, Patented August5,i873.

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A. B. CA R LIN Machinesfor Boring Blind-Stiles. No, 141,545, Patented August5,1873.-

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ANDREW B. GARLIN, OF CAMDEN, NEW JEEsEY.

IMPROVEMENT EN MACHINES FQR BORING BLIND-STILES.

Specification forming part of Letters Patent No. 141,545, dated August 5, 1873; application filed June 4, 1873.

To all whom itmag/ concern:

Be it known that I, ANDREW B. CARLIN, of Camden, in the county of Camden and State of New Jersey, have invented certain Improvements in Machines for Boring Blind-Stiles, of which the following is a specification:

The following are the principal features of my invention: A sliding bar provided with a sprin g-pawl receives areciprocatin g motion by means of a crank-shaft for carrying forward the carriage which supports a pair of blindstiles, the movements of the carriage alternating with the boring of the holes in the stiles. The boring-bits are connected with horizontal revolving shafts, which are borne inwardly toward the stiles during the boring operation by means of bell-crank levers, operated bya sliding bar, which is propelled forward by a cam on said crank-shaft. The bits are returned out of the holes when the cam is disengaged from the said sliding bar, and the latter is returned to its first position, thereby giving a reversed movement to the levers, and carrying the bits out of the newly-bored holes.

The details as to the construction and operation of the machine will be given below.

Figure 1 is a plan view of myimproved ma chine. Fig. 2 is a side elevation of the same.

Fig. 3, Sheet No. 2, is a plan view of the im-, proved machine with the carriage H and parts attached removed. Fig. lis avertical section at the line 00 w of Fig. 3. Fig. 5, Sheet No.3, is a reversed plan of the carriage H. Fig. 6 is an edge view of the same. Fig. 7 is an isoinetrical View of one of the sliding plates Q. Fig. 8 is a like view of one of the bell-crank levers 1%. Fig. 9 is a like view of the sliding bar T.

Like letters in all the figures indicate the same parts.

A is the frame, which supports the other parts of the machine. B is the driving-shaft. O is a shaft having on its inner end a crankpin, a, and between its bearings a cam, 12. D is a pitman, connected at one end with the crank-pin a and at the other end with the sliding bar E, provided with a pawl, F, which engages with the toothed rack G on the under side of the carriage H. The stiles c c to be bored are held down on the carriage by the adjustable springs I I, and up against the outer edges of the gage-bars J J by means of the springs I I. The gage-bars are adjusted outwardly or inwardly in accommodation to the width of the stiles or other piece to be bored by means of the swivel-bars K K, the latter being connected with the central rib d of the carriage by means of the screws 6 e, on which they are permitted to turn in their adjustment, and by which they are fastened when adjusted,the outer ends of the bars being connected to the gage-bars by means of the pivots f f f f. The said shaft 0 is connected with the counter-shaft G by means of the belt M, which passes over the pulley N on the shaft 0, and the pulley l on one end of the counter-shaft. The counter'shaft is connected with the driving-shaft B by means of the belt M which passes over the pulleys N and N 0 O are boring-bits in the inner ends of the revolving shafts P l which have sliding journals 9 g and g g supported by the bearings h h and h h. The shafts are caused to move inwardly toward the stiles to be bored by means of the connection of their outer ends to the sliding plates Q Q by means of the annular groovesi t and the upturned forked ends jj, Fig. 7, of

the plates, and the connection of the inner ends of the plates with the bell-crank levers R R by means of the downturned ends KK of the inner ends of the plates with the slots 1 Z of the levers, the levers being on the fulcrum-pins mm and operated by means of the sliding bar S, and the forward movement of the bar being given by means of the cam b on the shaft 0 engaging with the stop 0 of said bar. After the carriage has come to a state of rest the said bar S is moved forward by the cam, as described, and as the bits 0 O are rotated, and the bar S moves forward, the bit-shafts P P are moved inwardly by their connection with said bar through the intermediates, as described, until the holes are bored to the proper depth; then the cam, having passed the stop and the weight 19, seen in Fig. 4, by means of the cord q, pulls the bar back to its forward position, and thus draws the bits 0 0 out of the newly-bored holes. The bit-shafts l? P are revolved by means of the belts M M which pass over the pulleys N N on the drivingshaft and the pulleys N N on the bit-shafts. During the time the middle mortises of the stiles are passing the bits the sliding bar S is caused to remain in a state of rest by the short lug r, Fig. 5, having an incline on its forward end bearing against the shoulder s of the sliding bar T, with which the rear end of the sliding bar S is connected, thus pushing the bar sidewise out of connection with the cam until the lug has passed the shoulder, the hinged lever U at one end of said bar T being thus moved inwardly, and its shoulder t dropping inside of the lug a on the top edge of the frame A. After the mortise has passed the bits the spring '0, connected at its lower end to one of the posts of the frame A, pushes the bar back to its former position on the lug until the last holes are bored in the stiles; then the long lug 9-, by coming against the said shoulder it, bears the bit in like manner to one side and arrests the motion of the sliding bar. The forward movement of the carriage H is arrested by the pin 00, which projects from its under side, bearing against the pawl F and disengaging it from the rack G. When the boring is completed the carriage H is drawn forward from the machine and placed on its end. The bored stiles are removed and others placed in position on the carriage to be bored. The pawl F is thrown again into connection with the rack G to give the forward movement to the carriage H; but in the disengagement of the pawl, as above described, the boltVhas been shot forward by the spring W, so as to engage its front end with the shoulder to of the pawl, whereby the latter is held securely in position. To unlock the pawl the operator bears the leverX, which passes through a slot of the said bolt V, backward to remove it from the pawl,

and the spring W bears the latter inwardly into connection with the rack G for the forward movement of the carriage.

I claim as my invention- 1. The swivel-bars K K, in combination with the center rib d of the carriage H and the gagebars J J, for the adjustment of the latter to the width of the stiles to be bored, substantially as described.

2. The combination of the sliding bar E, carrying the pawl F, with the carriage H havin g a toothed rack, Gr, pitman D, and the crankshaft 0 for giving the forward movement to the carriage, substantially as set forth.

3. The combination of the pawl F having a shoulder, w, sliding bar E, spring-bolt V, and rack G with the carriage H having a trippingpin 00, substantially as and for the purpose specified.

4. The combination of the lever X, springbolt V, pawl F, and rack G, substantially as and for the purpose set forth.

5. The combination of the cam 1), weight 1), sliding bar S having a stop, 0, levers R R, slidin g plates Q Q with the bit-shafts P 1? for giving a reciprocating movement to the latter, substantially as set forth.

6. The sliding bar T, spring 11, hinged lever U having a shoulder, t, and sliding bar S with the carriage H, for throwing the stop 0 out of line with the cam b to arrest the sliding movement of the bit-shafts P P, substantially as described.

ANDREW BOON (JARLIN.

Witnesses:

THOMAS J. BEWLEY, STEPHEN USTICK. 

